Configure VLANIF Interface Address Pool

If a DHCP server based on a VLANIF interface address pool is configured, all the users going online through this interface obtain IP addresses from the VLANIF interface address pool.

Context

Before configuring an address pool on a VLANIF interface, you must enable DHCP.
You can configure an address pool on a VLANIF interface when a device supports switched Ethernet interfaces. IP addresses cannot be configured on switched Ethernet interfaces directly; therefore, you need to create a VLANIF interface and configure a DHCP address pool on the VLANIF interface.
The interface address pool takes precedence over the global address pool. If an address pool is configured on an interface, clients obtain IP addresses preferentially from the interface address pool even if a global address pool is configured.

Procedure

Query information about a VLANIF interface address pool.
1. Choose Service Management > DHCP > Configure VLANIF Interface Address Pool in the navigation tree to open the Configure VLANIF Interface Address Pool page.
2. Set the search criteria.
3. Click Query to display all the matching records.

Create a VLANIF address pool.

Choose Service Management > DHCP > Configure VLANIF Interface Address Pool in the navigation tree to open the Configure VLANIF Interface Address Pool page.

Click New to open the Create a VLANIF Address Pool page.

Table 1 describes the parameters on the Create a VLANIF Address Pool page.

**Table 1** Create a VLANIF Address Pool
Parameter		Description
Basic Settings	VLANIF Name	Indicates the name of a VLNAIF interface. Select a name from the drop-down list box. NOTE: The VLANIF interfaces in the drop-down list box are created in the Interface Management module.
	Interface IP	Indicates the IP address of the selected VLANIF interface. The value is displayed automatically after you select a VLANIF interface.
	Mask	Indicates the subnet mask of the selected VLANIF interface. The value is displayed automatically after you select a VLANIF interface.
	Expired	Indicates the lease of dynamic IP addresses. The default lease is one day. The value range is as follows: day: an integer ranging from 0 to 999 hour: an integer ranging from 0 to 23 minute: an integer ranging from 0 to 59 NOTE: Different address pools can have different IP address leases, but addresses in one pool have the same lease.
	Forbidden IP	Indicates the IP address that will not be dynamically allocated to users. Some IP addresses are allocated to applications such as the DNS server and cannot be allocated to users. You can specify these IP addresses as forbidden IP addresses. NOTE: To add a forbidden IP address, click Add. To delete a forbidden IP address, select it and click Delete.
Configure DNS for the Address Pool	Client Domain Name	Indicates the domain name allocated by the DHCP server to the client.
Configure DNS for the Address Pool	DNS Server IP	Indicates the IP address of a DNS server. You can configure a maximum of eight DNS server addresses. NOTE: To add a DNS server address, click Add. To delete a DNS server address, select it and click Delete.
Configure NetBIOS for the Address Pool	NetBIOS Node Type	Indicates the type of a NetBIOS node. The options are: unspecified The NetBIOS node type is not specified. b-node The NetBIOS node obtains the mapping between the host name and IP address in broadcast mode. b represents broadcast. p-node The NetBIOS node obtains the mapping between the host name and IP address by communicating with the NetBIOS server. p represents peer to peer. m-node The NetBIOS node is a p-type node with some broadcast features. m represents mixed. h-node The NetBIOS node is a b-type node using the peer-to-peer communication mechanism. h represents hybrid. The default value is unspecified.
Configure NetBIOS for the Address Pool	NetBIOS Server IP	Indicates the IP address of a NetBIOS server. You can configure a maximum of eight NetBIOS server addresses. NOTE: To add a NetBIOS server address, click Add. To delete a NetBIOS server address, select it and click Delete.

Set the parameters.
Click OK.

Modify VLANIF Address Pool
1. Choose Service Management > DHCP > Configure VLANIF Interface Address Pool in the navigation tree to open the Configure VLANIF Interface Address Pool page.
2. Click to open the Modify VLANIF Address Pool page .
  NOTE:
  - Table 1 describes the parameters on the Modify VLANIF Address Pool page.
  - The name, IP address, subnet mask of the selected VLANIF interface cannot be modified.
3. Set the parameters.
4. Click OK.
Delete a VLANIF Address Pool
1. Choose Service Management > DHCP > Configure VLANIF Interface Address Pool in the navigation tree to open the Configure VLANIF Interface Address Pool page.
2. Select a record that you want to delete and click Delete. The system asks you whether to delete the record.
  NOTE:
  - To select a record, click the check box of the record.
  - To delete records in batches, click check boxes of the records.
3. Click OK.